Green Assembly member Caroline Russell, who received complaints from her constituents about the advert, said, according to the Evening Standard: “People taking the Tube should not have to be bombarded with adverts that imply their bodies aren’t good enough.

“Young people receive this negative message from enough social media channels and it’s appalling that this is being reinforced on Tube platforms, against the Mayor’s own policy, when people are taking trips to school, to work, or going out to socialise.

“I am urging the Mayor to look again at these adverts that challenge young people to ‘keep up’ with reality stars known for idealised and unrealistic body shapes. He needs to enforce his own guidelines and live up to his manifesto promise to Londoners.

“Every body is a good body and TfL should be promoting inclusion and making their stations welcoming spaces. Allowing these adverts risks making people lose confidence in themselves.”

A spokesperson for the Mayor defended the decision to allow the advert: “This advert was closely reviewed and deemed to comply with the new TfL advertising policy that bans adverts that could pressurise people to conform to unhealthy or unrealistic body images.”